Electronic device and its multi-input amplifier circuit

Abstract

This invention discloses an electronic device comprising: a first baseband circuit, a second baseband circuit, a first transceiver circuit, a second transceiver circuit, and a switch. The first transceiver circuit is coupled to the first baseband circuit and includes a first transmission circuit and a multi-input amplifier circuit. The first transmission circuit is coupled to the first baseband circuit. The multi-input amplifier circuit is coupled to the first transmission circuit. The second transceiver circuit is coupled to the second baseband circuit and includes a second transmission circuit and a driver amplifier. The second transmission circuit is coupled to the second baseband circuit. The switch is coupled to the second transmission circuit, the multi-input amplifier circuit, and the driver amplifier. The switch is controlled by either the first or second baseband circuit and is used to connect the second transmission circuit to the multi-input amplifier circuit or the driver amplifier.

Claims

1. An electronic device comprising: a first baseband circuit; a second baseband circuit; a first transceiver circuit coupled to the first baseband circuit, comprising: a first transmission circuit coupled to the first baseband circuit; The system includes a multi-input amplifier circuit coupled to the first transmission circuit; a second transceiver circuit coupled to the second baseband circuit, comprising: a second transmission circuit coupled to the second baseband circuit; and a driver amplifier. The system includes a switch coupled to the second transmission circuit, the multi-input amplifier circuit, and the driver amplifier; wherein the switch is controlled by the first baseband circuit or the second baseband circuit to connect the second transmission circuit to the multi-input amplifier circuit or the driver amplifier; wherein the multi-input amplifier circuit has a first input terminal and a second input terminal, the first input terminal being coupled to the first transmission circuit and the second input terminal being coupled to the switch, the multi-input amplifier circuit comprising: a power divider coupled to the first input terminal; an amplifier coupled to the power divider for generating a first signal and a second signal; and a power combiner coupled to the amplifier for combining the first signal and the second signal to generate a third signal; wherein the first transmission circuit outputs a fourth signal, and when the switch connects the second transmission circuit to the driver amplifier, the power divider generates a first intermediate signal and a second intermediate signal according to the fourth signal, and the amplifier amplifies the first intermediate signal and the second intermediate signal to generate the first signal and the second signal respectively.

2. The electronic device as claimed in claim 1, wherein, The power divider includes: a first primary winding having a first terminal and a second terminal, wherein the first terminal is coupled to the first input terminal; a first secondary winding coupled to the amplifier; a second primary winding having a third terminal and a fourth terminal, wherein the third terminal is coupled to the second terminal and the fourth terminal is coupled to a reference voltage; and a second secondary winding coupled to the amplifier.

3. The electronic device as claimed in claim 1, wherein, The power divider includes: a first coupler having a third input, a fourth input, a first output, and a second output, wherein the third input is coupled to the first input and the fourth input is coupled to a reference voltage; a second coupler having a fifth input, a sixth input, a third output, and a fourth output, wherein the fifth input is coupled to the first output, the sixth input is coupled to the reference voltage, and the third and fourth outputs are coupled to the amplifier; and a third coupler having a seventh input, an eighth input, a fifth output, and a sixth output, wherein the seventh input is coupled to the second output, the eighth input is coupled to the reference voltage, and the fifth and sixth outputs are coupled to the amplifier.

4. An electronic device comprising: a first baseband circuit; a second baseband circuit; a first transceiver circuit coupled to the first baseband circuit, comprising: a first transmission circuit coupled to the first baseband circuit; The system includes a multi-input amplifier circuit coupled to the first transmission circuit; a second transceiver circuit coupled to the second transceiver circuit, comprising: a second transmission circuit coupled to the second baseband circuit; and a driver amplifier. The system includes a switch coupled to the second transmission circuit, the multi-input amplifier circuit, and the driver amplifier; wherein the switch is controlled by the first baseband circuit or the second baseband circuit to connect the second transmission circuit to the multi-input amplifier circuit or the driver amplifier; wherein the multi-input amplifier circuit has a first input terminal and a second input terminal, the first input terminal being coupled to the first transmission circuit and the second input terminal being coupled to the switch, the multi-input amplifier circuit comprising: a power divider coupled to the first input terminal; an amplifier coupled to the power divider for generating a first signal and a second signal; and a power combiner coupled to the amplifier for combining the first signal and the second signal to generate a third signal; wherein the first transmission circuit outputs a fourth signal and the second transmission circuit outputs a fifth signal, and when the switch connects the second transmission circuit to the multi-input amplifier circuit, the amplifier amplifies the fourth signal and the fifth signal to generate the first signal and the second signal, respectively.

5. The electronic device as claimed in claim 4, wherein, The power divider includes: a first primary-side coil having a first terminal and a second terminal, wherein the first terminal is coupled to the first input terminal and the second terminal is coupled to a reference voltage; a first secondary-side coil coupled to the amplifier; a second primary-side coil having a third terminal and a fourth terminal, wherein the third terminal is coupled to the second input terminal and the fourth terminal is coupled to the reference voltage; and a second secondary-side coil coupled to the amplifier.

6. The electronic device as claimed in claim 4, wherein, The power divider includes: a first coupler having a third input, a fourth input, a first output, and a second output, wherein the third input is coupled to the first input, the fourth input is coupled to a reference voltage, and the first and second outputs are coupled to the amplifier; and a second coupler having a fifth input, a sixth input, a third output, and a fourth output, wherein the fifth input is coupled to the second input, the sixth input is coupled to the reference voltage, and the third and fourth outputs are coupled to the amplifier.

7. A multi-input amplifier circuit having a first input terminal, a second input terminal, and an output terminal, wherein the first input terminal is used to receive a first signal, and the second input terminal is used to receive a second signal, the multi-input amplifier circuit comprising: a power divider including a first primary-side coil, a first secondary-side coil, a second primary-side coil, and a second secondary-side coil, used to generate a first intermediate signal and a second intermediate signal, wherein... The first primary winding is coupled to the first input terminal, and the second primary winding is coupled to a reference voltage; a first switch is coupled to the first primary winding and the second primary winding; a second switch is coupled to the second input terminal and the second primary winding; an amplifier is coupled to the first secondary winding and the second secondary winding for amplifying the first intermediate signal and the second intermediate signal to generate a third signal and a fourth signal, respectively; and a power combiner is coupled to the amplifier and the output terminal for combining the third signal and the fourth signal to generate a fifth signal.

8. A multi-input amplifier circuit having a first input terminal, a second input terminal, and an output terminal, the first input terminal being used to receive a first signal, and the second input terminal being used to receive a second signal, the multi-input amplifier circuit comprising: a power divider coupled to the first input terminal and the second input terminal, used to generate a first intermediate signal and a second intermediate signal, and including a first coupler, a second coupler, and a third coupler coupled to each other; an amplifier coupled to the power divider, used to amplify the first intermediate signal and the second intermediate signal to generate a third signal and a fourth signal respectively; and a power combiner coupled to the amplifier and the output terminal, used to combine the third signal and the fourth signal to generate a fifth signal; wherein... The output terminal is a first output terminal, and the power divider further includes: a first switch coupled to the first input terminal and a third input terminal of the first coupler; a second switch coupled to the first switch, a second output terminal of the first coupler and a fourth input terminal of the second coupler; and a third switch coupled to the second input terminal, a third output terminal of the first coupler and a fifth input terminal of the third coupler.

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